Retrieval of atmospheric temperature profile from the spaceborne infrared spectra with Tikhonov regularization method

Dong Liu; Jing Ma; Hongxia Mao; Yanbing Dong

doi:10.1117/12.2626632

27 March 2022 Retrieval of atmospheric temperature profile from the spaceborne infrared spectra with Tikhonov regularization method

Dong Liu, Jing Ma, Hongxia Mao, Yanbing Dong

Author Affiliations +

Proceedings Volume 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications; 12169B6 (2022) https://doi.org/10.1117/12.2626632
Event: Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 2021, Kunming, China

Abstract

The accurate atmospheric temperature profile retrieved from the spaceborne infrared spectra is very important data source for the evaluation of infrared engineering and the analysis of weather/climate process, especially for the place where other high-quality data sources are not available, such as the ocean and desert. Most of current algorithms are severely dependent on historical information to constrain retrieval process, which would encounter the issues of accuracy and stability in the wild field as mentioned above. To resolve this contradiction, the Gauss-Newton iteration method with Tikhonov regularization is proposed in this paper. To constrain the iteration by keeping the balance between norm of solution and norm of spectra residual, the method can select the initial profile and regularization matrix that are independent with historical information. Besides, the information content theory is employed to select the appropriate spectral channels to achieve optimal solution. The simulation experiment is conducted to validate the proposed method. The results prove that the effective retrieval profile can be achieved very quickly and is insensitive to the initial profile or spectra noise, which demonstrates its good performance.

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Dong Liu, Jing Ma, Hongxia Mao, and Yanbing Dong "Retrieval of atmospheric temperature profile from the spaceborne infrared spectra with Tikhonov regularization method", Proc. SPIE 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 12169B6 (27 March 2022); https://doi.org/10.1117/12.2626632

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KEYWORDS

Infrared radiation

Atmospheric modeling

Atmospheric optics

Radiative transfer

Atmospheric physics

Temperature metrology

Computer simulations

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